摘要:

Fecundity estimates were made for snapperChrysophrys auratus, a serial spawning fish, for the 1974–75 and 1975–76 spawning seasons. Weighed sub‐samples of ovaries were used, and eggs were counted manually. All eggs >0.1 mm diameter were considered potentially capable of being spawned; estimates of these eggs were made at the beginning and end of spawning, and their difference was considered to be the actual fecundity. A log‐log transformation of egg numbers against length offish gave a linear relationship. Fecundity estimates ranged from 297 000 at 25 cm to 4 528 000 at 50 cm in 1974–75, and from 83 000 at 25 cm to 6 164 000 at 50 cm in 1975–76. Counts of ripe eggs were also made, and batch sizes ranging from 13 000 at 25 cm to 104 000 at 50 cm were predicted. By combining these data with fecundity estimates the number of batches spawned was estimated to be 23–44 in 1974–75, depending on and increasing with length; and 6–59 in 1975–76.

ISSN:0028-8330    

DOI:10.1080/00288330.1977.9515712

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The activity budgets of territorial males, adult females, pups, and yearlings of the New Zealand fur sealArctocephalus forsteri(Lesson, 1828) on Taumaka, Open Bay Islands, Westland, New Zealand (43° 52 S, 168° 53′ E) from 18 November 1974 to 30 January 1975 are described. Territorial males spent an average of 74.4% of their time lying down; 13.5% in a state of alertness; 4.8% on intrasexual and intersexual activities combined; and 7.3% on miscellaneous activities, including grooming, walking, and swimming. Equivalent figures for adult females, pups, and yearlings were: lying down (62.8%, 70.1%, and 66.6% respectively); alertness (4.9%, 2.8%, 6.8%); intrasexual and intersexual activities (1.1%, females only); miscellaneous (21%; 16%; 26.5%); female‐pup interactions (11%; 11.1%).

ISSN:0028-8330    

DOI:10.1080/00288330.1977.9515713

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The second and third recorded births of southern elephant sealsMirounga leoninaon the mainland of New Zealand occurred at Kaikoura in mid‐October 1976. One female pup died within 14 d of birth and the other (sex unknown) disappeared from the region with its mother on 19 November 1976.

ISSN:0028-8330    

DOI:10.1080/00288330.1977.9515714

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Recently dead fragments of the spatangoid echinoidPericosmussp. are recorded from the northern Bay of Plenty, 288–318 m. This record adds a further genus of Indo‐Pacific echinoderms to the New Zealand fauna.

ISSN:0028-8330    

DOI:10.1080/00288330.1977.9515715

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

A comparison was madebetweenthe electrophoretic patterns of isozymes of esterases and glucosephosphate isomerases of adult snapperChryosophrys auratus, suspected snapper larvae, jack mackerelTrachurus novaezelandiaelarvae, and blue mackerelScomber australasicuslarvae. The suspected snapper larvae revealed similar isozyme patterns to those of the adults, but differed from the other two larval species.

ISSN:0028-8330    

DOI:10.1080/00288330.1977.9515716

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor